Commands by bw

Commands by bw (6)

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show ALL iptable rules

show your current iptable rules from every available iptable table
This is sample output - yours may be different.
1

for i in `cat /proc/net/ip_tables_names`; do iptables -nL -v --line-numbers -t $i ; done

bw · 2010-04-23 13:53:49 6
Send your svn diff to meld

If you like to view what has been changed between revision 100 and the BASE on FILE. Meld will give you a nice overview.
This is sample output - yours may be different.
5

svn diff --diff-cmd='meld' -r 100:BASE FILE

bw · 2010-03-31 11:27:20 3
split and combine different pages from different pdf's

The command shows the real power of the pdftk tool, you can do basically everything you want with multiple pdf's. In the command a book is created from chapters, headings and covers.
This is sample output - yours may be different.
7

pdftk A=chapters.pdf B=headings.pdf C=covers.pdf cat C1 B1 A1-7 B2 A8-10 C2 output book.pdf

bw · 2010-03-02 16:04:50 2
clone an USB stick using dd + see its process

The following command will clone usb stick inside /dev/sdc to /dev/sdd Double check you got the correct usb sticks (origional-clone)with fdisk -l.
This is sample output - yours may be different.
3

dd if=/dev/sdc of=/dev/sdd conv=notrunc & while killall -USR1 dd; do sleep 5; done

bw · 2010-01-12 14:09:40 5
create disk copy over the net without temp files

I wanted to create a copy of my whole laptop disk on an lvm disk of the same size. First I created the logical volume: lvcreate -L120G -nlaptop mylvms SOURCE: dd if=/dev/sda bs=16065b | netcat ip-target 1234 TARGET: nc -l -p 1234 | dd of=/dev/mapper/mylvms-laptop bs=16065b to follow its process you issue the following command in a different terminal STATS: on target in a different terminal: watch -n60 -- kill -USR1 $(pgrep dd) (see http://www.commandlinefu.com/commands/view/4356/output-stats-from-a-running-dd-command-to-see-its-progress)
This is sample output - yours may be different.
7

SOURCE: dd if=/dev/sda bs=16065b | netcat ip-target 1234 TARGET: netcat -l -p 1234 | dd of=/dev/mapper/laptop bs=16065b STATS on target: watch -n60 -- kill -USR1 $(pgrep dd)

bw · 2009-12-16 10:51:06 5
output stats from a running dd command to see its progress

if you start a large dd and forgot about statistics, but you still wonder what the progress is this command in an OTHER terminal will show you the way. NOTE: the watch command by itself will not output anything NOTE: the kill command will not kill the process Show Sample Output
This is sample output - yours may be different.
```
It will let the running dd command outputting stats like this:

5745+20519787 records in
5745+20519787 records out
38845006016 bytes (39 GB) copied, 3389.22 s, 11.5 MB/s
```
2

watch -n60 --kill -USR1 $(pgrep dd)

bw · 2009-12-16 10:35:28 2

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Ensure that each machine that you log in to has its own history file

On systems where your home directory is shared across different machines, your bash history will be global, rather than being a separate history per machine. This setting in your .bashrc file will ensure that each machine has its own history file.

Every Nth line position # (AWK)

A better way to show the file lines 3n + 1

list ips with high number of connections

Leap year calculation

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Easily find latex package documentation

If the pdf/dvi/etc documentation for a latex package is already part of your local texmf tree, then texdoc will find and display it for you. If the documentation is not available on your system, it will bring up the package's webpage at CTAN to help you investigate.

extract column from csv file

extracts the 5th column using the delimiter ','

Get a quick list of all user and group owners of files and dirs under the cwd.

find -printf '%u\n' | sort | uniq #just users find -printf '%g\n' | sort | uniq #just groups

check open ports (both ipv4 and ipv6)

Update your journal

prerequisite: $ mkdir ~/journal

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Commands by bw (6)

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